Device for automatically locking doors of railway-cars while the train travels.



No. 877,724. PATENTED JAN. 28, 1908. W. MITTMANN. DEVICE FOR AUTOMATIC ALLY LOCKING DOORS OF RAILWAY GARS' WHILE THE TRAIN TRAVELS. APPLICATION IILE D AUG. 14, 1907.

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, TED STATES PATENT OFFICE.

WILHELM MITTMANN, OF ESSEN-WEST, GERMANY.

DEVICE FOR AUTOMATICALLY LOCKING DOORS OF RAILWAY-CARS WHILE THE TRAIN TRAVELS.

upon actuation of the governor by the rota- 1 Specification of Letters Patent.

Patented Jan. 28,1908.

Application filed August 14:. 1907. Serial No. 388.494.

To all whom it may concern:

Be it known that I, WILHELM MITTMANN, a subject of the German Emperor, and rcsident of Essenest Germany, have invented certain new and useful Improvements in Devices for Automatically Locking Doors of Railway-Cars While the Train Travels, of which the following is a specification.

This invention relates to a new or improved device for automatically locking the doors of railway cars while the train travels, which essentially comprises a governor which is connected to one of the wheel axles of the car so as to be actuated by the rotation of the axle, this action being transmitted by means of an ingenious lever system to a separate locking bar provided on the doors.

The accompanying drawing shows the improved device in Figures 1 & 2 in two views at right angles to each other, as mounted on a railway car.

The device essentially comprises a ball governor 1 which is mounted in a bracket 2 arranged below the bottom of the car. The axle 3 of the governor carries at its lower end a grooved roller 4 which is by means of a wire rope 5 or the like in communication with another grooved roller 6 keyed on one of the wheel axles of the car. On the sleeve 7 of the governor a movable ring 8 made in two parts is mounted independently from the movement of the sleeve, to which doublearmed levers 10 are pivotally connected at 9, which are centered by means of their elongated slots 12 in brackets 11 arranged below the bottom of the car. The free ends of these double-armed levers 10 are pivoted to links 13 which again are pivotally connected to angle-levers 1.4, 18 keyed on a common shaft 16 which is movably mounted in projections of the H-beams 15 forming part of the framing of the car. The arms 18 of these angle-levers pass through cut-out parts 17 in these H-beams and are beyond the latter pivoted to rods 19 which are disposed in the double wall of the car and at their free ends connected to pivotal members 20. The latter are on the one hand centered in the wall of the car and on the other hand pivoted to the separate locking bars 21 for the doors, which bars are movably held in brackets 22 and adapted to enter holes 23 provided in the door.

The operation of the device is such that tion of the wheel axle the doors of the car are locked by the bars 21 penetrating the holes 23, while they are again unlocked when the car stops, all this being effected through the medium of the ingeniously constructed lever system connected to or intervening between governor and locking bars.

Having fully described my invention, what I claim and desire to secure by Letters Patent is:

A device for automatically locking the doors of railway cars while the train travels, comprising in combination with the car having a double wall, its doors having a hole, its Wheel axles, and its framing having H-beams with cut-out parts; a governor arranged below the bottom of said car and having the usual sleeve arranged on its axle, a bracket to hold said governor on the bottom of said car, a grooved roller provided on the lower end of said governor axle, another grooved roller keyed on one of said wheel axles, a wire rope to connect said grooved rollers, a movable ring of two parts mounted on the sleeve of said governor independently from the rotary movement of the latter, double-armed levers having elongated slots and pivoted with one arm to said ring, brackets arranged below the bottom of the car to hold said double-armed levers by means of the elongated slots in the latter, links pivoted to the other arm of said double-armed levers, common shafts movably mounted in said H-beams, angle levers keyed on said common shafts and arranged so as to be pivoted with one arm tosaid links and to project with the other arm through the cut-out parts in said H-beams, rods pivoted with one end to these other arms of said angle levers and disposed in the double wall of said car, locking bars adapted to enter the holes in said door, brackets to hold said locking bars, pivotal members connected to the free ends of said rods and on the one hand centered in the wall of said car and on the other hand pivoted to said locking bars, for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing VVILHELM MITTMANN.

witnesses.

Witnesses M. ENGELS, ALFRED POHLMEYER. 

